GraalVM has always been built and maintained outside of the OpenJDK. Staring with Java 9 Oracle started including it with OpenJDK to provide AOT compilation, bu

GraalVM has always been built and maintained outside of the OpenJDK. Staring with Java 9 Oracle started including it with OpenJDK to provide AOT compilation, but as the article says, it wasn't widely adopted by OpenJDK users. Most people who wanted AOT would use GraalVM directly, so for most people nothings changed. Those that did use the OpenJDK AOT will have to migrate to using GraalVM's tooling post Java 15.